<template>
  <div class="login_container">
      <div class="login_box">
          <!-- 头像 -->
          <div class="photo">
              <img src="../assets/logo.png" alt="">
          </div>
          <!-- 登录信息 -->
          <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
              <!-- 用户名 -->
             <el-form-item prop="username">
                 <!-- 属性方式添加图标 -->
             <el-input prefix-icon="el-icon-user-solid" v-model="loginForm.username"></el-input>
             </el-form-item>
             <!-- 密码 -->
             <el-form-item prop="password">
                 <!-- slot方式添加图标 -->
             <el-input type="password" v-model="loginForm.password"> <i slot="prefix" class="el-input__icon el-icon-lock"></i> </el-input>
             </el-form-item>
             <!-- 按钮 -->
             <el-form-item class="btn">
             <el-button type="primary" @click="login">登录</el-button>
             <el-button type="info" @click="resetLoginForm">重置</el-button>
             </el-form-item>
          </el-form>
      </div>
    </div>
</template>
<script>
export default {
  data () {
    return {
      // 登录表单数据
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表单验证规则
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 表单校验
    login: function () {
      this.$refs.loginFormRef.validate(async vaild => {
        if (!vaild) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) {
          return this.$message.error('登陆失败')
        } else {
          this.$message.success('登陆成功')
          // 将登录后的token 存储到客户端的sessionStorage（sessionStorage会话间的存储介质 ，localStorage永久性的存储介质）
          // token只在当前网站打开期间有效
          window.sessionStorage.setItem('token', res.data.token)
          // 登录成功后转到home页面
          this.$router.push('/home')
        }
      })
    },
    // 重置表单
    resetLoginForm: function () {
      this.$refs.loginFormRef.resetFields()
    }
  }
}
</script>
<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
   position: absolute;
   left:50%;
   top: 50%;
   transform: translate(-50%,-50%);

   .photo{
        position:absolute;
        height: 130px;
        width: 130px;
        border-radius: 50%;
        left:50%;
        transform:translate(-50%,-50%);
        background-color:#fff;
        border:1px solid #eee;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        img{
            width: 100%;
            height: 100%;
            border-radius:50%;
            background-color: rgb(226, 226, 226);
        }
    }
    .login_form {
        position: absolute;
        width: 100%;
        top: 40%;
        left: 0;
        padding: 0 10px;
        box-sizing: border-box;
    }
    .btn{
        display:flex;
        justify-content: flex-end;
    }
}
</style>
